return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for HCCNH2 (Ethynamine)

using model chemistry: CCSD=FULL/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCSD=FULL/TZVP
 hartrees
Energy at 0K-132.414429
Energy at 298.15K-132.416558
HF Energy-131.897804
Nuclear repulsion energy59.344751
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at CCSD=FULL/TZVP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3584 3396 15.77      
2 A' 3518 3333 75.79      
3 A' 2259 2140 82.62      
4 A' 1670 1583 33.37      
5 A' 1070 1014 11.31      
6 A' 733 694 234.00      
7 A' 525 498 87.21      
8 A' 407 386 9.63      
9 A" 3677 3484 26.58      
10 A" 1229 1164 0.37      
11 A" 656 622 40.43      
12 A" 311 294 5.48      

Unscaled Zero Point Vibrational Energy (zpe) 9818.7 cm-1
Scaled (by 0.9475) Zero Point Vibrational Energy (zpe) 9303.3 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at CCSD=FULL/TZVP
ABC
10.09537 0.31036 0.30412

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.060 1.367 0.000
C2 0.000 0.164 0.000
N3 0.043 -1.199 0.000
H4 0.054 2.427 0.000
H5 -0.359 -1.606 0.831
H6 -0.359 -1.606 -0.831

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.20432.56591.06033.11523.1152
C21.20431.36372.26371.98811.9881
N32.56591.36373.62621.00911.0091
H41.06032.26373.62624.13854.1385
H53.11521.98811.00914.13851.6623
H63.11521.98811.00914.13851.6623

picture of Ethynamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 175.314 C2 C1 H4 176.783
C2 N3 H5 112.986 C2 N3 H6 112.986
H5 N3 H6 110.914
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability